The independent Quinnipiac University Poll also found that in the other winner-take-all primary next week in Ohio, Clinton, who has lived in Chappaqua since 1999, leads Sanders 52-43 percent among Democratic primary voters.
In Florida, 6 percent of likely voters remain undecided and 16 percent who named a candidate said they might change who they vote for, the poll found.
In Ohio, the poll found that 5 percent of voters remained undecided and those who did name a candidate, said there was a 17 percent chance they might change their mind.
"Secretary Hillary Clinton has doubled-up on Sen. Bernie Sanders in Florida. With less than a week until the actual voting, it is difficult to see a path to victory for him in the Sunshine State. He just has too much ground to make up and not enough time in which to do it," said Peter A. Brown, assistant director of the Quinnipiac University Poll.
The poll surveyed 511 Florida likely Democratic primary voters with a margin of error of +/- 4.3 percentage points and 521 Ohio likely Democratic primary voters with a margin of error of +/- 4.3 percentage points.
Click here to follow Daily Voice Bridgeport and receive free news updates.